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(No Model.)

C. & G. M. HEINTZ 8; A. DOTTERWEIOH.

COMBINED AIR PRESSURE APPARATUSAND REFRIGERATOR.

No. 311,831. Patented Feb. 3, 1885.

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ATTORNEYS.

'tl'n rn dramas CHRISTIAN HEINTZ AND GEORGE M. HEINTZ, OF BUFFALO, AND ANDREI/V DOTIERlVEIOH, OF DUNKIRK, NEW YORK; SAID DOTTERWVEIOH AS- SIGNOR TO SAID C. AND G. M. HEINTZ.

COMBINED AIR-PRESSURE APPARATUS AND REFRIGERATOR.

SPECIFICATION forming part of Letters Patent No. 311,831, dated February 3, 1885.

Application filed July 12, 1884. (No model.)

To all whom, it may concern:

Be it known that we, CHRISTIAN Hnrn'rz and GEORGE M. I-IEINTZ, both of Buffalo, in the county of Erie and State of New York, and

ANDREW DOTTERWEICH, of Dunkirk, in the county of Chautauqua and State of New York, have invented a new and Improved Combined Air-Pressure Apparatus and Refrigerator, of which the following is a full, clear, and eXact IO description.

This invention relates to certain improvements in the air-pressure apparatus for beer kegs, &c., shown and described in Letters Patent N 0. 294,230, which were granted to us I 5 February 26, 1884.; and our present invention consists in placing the air-tank in the ice-box of the refrigerator, whereby the air contained in the air-tank may be lowered in tempera ture before it is admitted to the beer-kegs.

2o Reference is to be had to the accompanying drawing, forming part of this specification, in which the figure is a broken front elevation of our present invention.

The refrigerator A and the water-tank B are of the same construction as shown and de scribed in the above-mentioned patent. The air-tank 0, instead of being placed upon the water-tank B, as in said patent, is placed in the ice-box or one of the compartments of the 0 refrigerator A, and it is connected with the water-tank B by the long pipe D, which is provided with the cocks a a. The air-tank O is connected also with the beer-kegs E E, placed in the refrigerator A by the pipes F F,

5 which are provided with the cooks b b and c c, for controlling the flow of air from the tank 0 to the beer-kegs. The water-tank B is connected with the water-head by the pipe G, which is provided with the cock d and auo tomatic cock f, the same as in said patent, and the water-tank I3 is provided also with the waste-pipe H, having cock grand also with the air-pipe I, which is prbvided with the cock h, and leads into the ice-box of the" refrigerator, substantially the same as shown and described in the said patent, and this pipe I acts with the water-tank B independentl y of the tank 0, for discharging a current of air into the ice-box, the same as stated in said patent. 0 act together for gaining a pressure of air in the tank G, the same as stated in said patent, withthe advantage tha.t,the tank 0 being placed in the refrigerator, the air held in the tank G will receive the benefit of the lowered temperature resulting from the ice in the re frigerator, and when salt and ammonia are placed upon the ice, and a continuous current of air is caused to flow into the refrigerator from the water-tank B through the pipe I, the reduction in temperature is very material, and the apparatus by this arrangement acts not only as an air-compressor, but also as a cooler or refrigerator of its own compressed air. Besides, by this arrangcment, a considerable space is gained, and the tank, 0 being contained within the same refrigerator with the beer-kegs, the air in passing from the tank to the kegs will not be raised in temperature from warm external air. A presstire-gage, J, is connected with the tank 0, for indicating the pressure of air in said tank.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is 75.

1. In a refrigerator, the process of lowering the temperature of the admitted air, which consists of forcing from a water or compressing chamber air into a refrigerant air-chamber, and returning the air thus lowered in temperature to said water-chamber, and in passing said additionally-cooled air through a pipe into the ice-chamber, substantially as described, and for the purpose set forth.

2. The air-tank O, placed in the refrigerator A and connected with the water-tank B,

The water-tank B and air-tank 0' in combination with the pipe I, leading from the tank 13 to the refrigerator, ,for discharging a current of air into the refrigerator and cooling the compressed air in the tank 0, substan tially as set forth.

3. In a refrigerator, the process of lowering 'the temperature of the admitted air, which consists of forcing air from a Water-chamber into a refrigerant air-chamber, and causing the cooled air of the refrigerant air-chamber to act in conjunction with the cooling agent of the water-chamber to further lower the temperature of the air of said Water-chamber,

substantially as described, and for the pur pose set forth.

CHRISTIAN HEINTZ. GEORGE M. HEINTZ. ANDREW DOTTERWEIOH. \Vitnesses to the signatures of Christian Heintz and George M. Heintz: RUDOLPH DOERR, EUGENE O. YENGER. Witnesses to the signature of Andrew Dotterweich:

JOHN H. LASOELLES, WILLIAM P. TOOMEY. 

